ARM: OMAP: DRA7: powerdomain data: fix powerdomain powerstate

DRA7 supports only CSWR for CPU, MPU power domains. Core power domain
supports upto INA.

Signed-off-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Kevin Hilman <khilman@linaro.org>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>